Preheat your air fryer: Set it to 350°F (175°C) for a few minutes so it’s ready when you are.
Make the custard: In a small bowl, whisk 1/3 cup Greek yogurt, 1 egg, 1–2 teaspoons sweetener, 1/4 teaspoon vanilla extract, and a pinch of salt until smooth.
Prep the bread: Use 2 slices of thick bread. With the back of a spoon, press a shallow well into the center of each slice, leaving a 1/2-inch border.
This helps hold the custard.
Optional richness: Lightly butter the outer edges of the bread or mist the basket with cooking spray for extra crisping.
Fill with custard: Spoon the mixture into the wells. Don’t overfill—aim for an even layer that reaches the edges but doesn’t spill over.
Add toppings: Place berries, a few chocolate chips, or a sprinkle of cinnamon on top. If using very juicy fruit, pat it dry first.
Air fry: Arrange the slices in a single layer in the basket.
Cook at 350°F (175°C) for 6–8 minutes, until the edges turn golden and the custard is just set in the center.
Check doneness: The custard should be slightly jiggly but not runny. If needed, cook 1–2 minutes more. Avoid overcooking or it will crack.
Finish and serve: Let it rest 1 minute.
Add a drizzle of honey or a dusting of powdered sugar if you like. Serve warm.